You're fighting Ed the Undying
You step into the chamber and discover a large stone sarcophagus, elaborately engraved and inlaid with gold. It takes all your strength to lever off the lid, but you soon get it open and discover the object of your quest, the Holy MacGuffin, radiating with its own inner light. It rests in the hands of a large mummy, wrapped in bandages of ancient silk and wearing a gold-filigreed crown. You step...